Pyrotechnical device



Dec. 14, 1926. 1,610,645

M. M. ADLER PYROTECHNICAL DEVI CE Filed Feb. 16 1925 IN V EN TOR.fzzzmjfzdkz;

ATTORNEYS.

Patented Dec. 14, 1926.

UNITES STATES relates earner ersten.

MLTON M. ADLER, OF NEWARK, NEW JERSEY.

PYROTECHNICAL DEVICE.

Application filed February rillus invention relates, generally, toimprovements in pyrotechnical devices; and the invention has reference,more particularly7 to a novel pyrotechnical device in the form or anexplosive or detonating tire-cracker.

The invention has for its principal object to provide a novelconstruction oi' explosive or detonating lire-cracker, consisting of anovel form oi' tubular container or casing, one end of which is inwardlycrimped or turned to provde an internal stop-shoulder against which isiirinly supported a base or end partition, which securely closes one endot said casing. A charge oi a suitable explosive is tamped into the.closed end of said casing, so as to be firmly backed and supported bysaid base or end partition: said charge being retained in place by atransverse wad or keeper member made of comparatively soft material,such, e. g., as heavy paper. The remaining open ended body of thecasing, beyond the charge of explosive, provides a discharge barrelwhich offers a path of least resistance to the forces of explosion Whenthe charge is ignited, so that the discharge of the expanding gases, generated by combustion of the charge, is directed through such barrel, notonly thereby tending to increase the loudness of the detonation orreport, but also tending to prevent the disruption of the body of thecasino'.y with attendant scattering about of burningl particles.Futhermore, the novel combination ot crimped stop shoulder and base o1'end partition, in connection with the comparatively stout container orcasing, provides a tirm and secure closure for the charge in the end ofthe easing, so that said parts are not likely to be blown apart by theeX- plosion ot the charge, to the possible injury of bystanders. Thenovel lire-cracher thus constructed may be provided with an ignitionfuse, suitablvv ent-ered into the explosive charge from either theclosed or open end of the casing as may be desired Other objects of thisinvention, not at this time more particularly enumerated, will beclearly understood from the following detailed description of the same.

The. invention is clearly illustrated in thej accompanying drawings, inwhich :d

Figure l is a perspective view of the novel lire cracher made accordingto and embodyingthe principles of this invention; Figure 2 is alongitudinal section through the same; Figure 3 is a transverse sectionthrough the ie, 1925. serial No. 9,464.

same, taken on line in Figure and drawn on an enlarged scale; and Figure4i is a longitudinal section ot' a slightly modifier forni of iny novelfire-cracker.

Similar characters oi reference are employed in all ot the hereinabovedescribed views.l to indicate corresponding parts.

Referring now to Figures l to 3 ofthe drawingsr the reference characterl indicates the body ot a tubular casing or container. This casing orcontainer may be made of sheet paper, which is rolled or wound uponitself, as shown in Figure 3, to 'term the desired tulnilar shape havingthe desired length and diameter. rllhe Walls ot the casing` or containerthus formed, are comprised et a plurality of thicknesses or plies ot'paper, sutiicient in number to provide a desired total thickness ofimaterial adapted to furnish a strong and tough caf- (ne end of the.casing thus formerL is inwardly crimped or turned to provide 'aninternal annular stop-shoulder 2. Inserted Within the interior ofsaidcasing l, .and then positioned so :is to abut the stopshoulder 9.,is a transverse base piece or end partition 3, Which is preferably madeot heavy card-board or similar material of relatively tough and rigidcharacter. Said base piece or end partition 3, being firmly supportedagainst displacementtrom the end of the casing' l by the stop-shoulder2, not only closes one end of the said casing, but also serves as a baseagainst which to position and back a charge l of a suitable explosive,which is entered through the open end of the casing and then tainpedfirmly into place. The charge L thus positioned Within the closed endoi' the casing 1, is kept in such position by means ot a transverse Wador keeper member 5, which separates the chargel from the comparativelylong barrel-like internal space 6 leading to the open end of the casingll Said Wad or keeper member is preferably made of relatively soft paperor similar material, which will easily disintegrate under the torce otthe explosion of the charge 4, when the latter is ignited, so that theforce of the explosion Will be directed tl rough the unobstructed barrelspace 6, thereby not only tending to increase the loudness of theresultant report or detonation, but also quickly relieving the Walls ofthe casing from the et'teets or force of the explosion, so that thelatter are not likely to be disrupted. In order to insure against Iiishown in Figures 1 to 3 inclusive; or the same may be entered throughthe open end oi the casing to extend through the barrel space G andthence through the Wad or keeper member 5, as shown in Figure 4.

Aside from the above-described modiied `arrangement of the fuse, whichis illustrated by Figure 4, said Figure a of the drawings, also shows,as a possible modification of the construction of my novel Iire-cracker,the casing or container, formed from'an integral tube l of iibrousniaterial` instead ot being formed by winding a sheet of fibrousmaterial, such as paper,` upon itself. The integral tube l is providedat one end with the inturned or crimped portion to 'form the stopshoulder 2. In other respects the construction ot the fire-cracker isthe same as that iii-st described, as is witnessed by the application tothe illustration thereof in Figure 4 of corresponding characters ofreference.

From the above description it will be quite apparent that mypresentinvention provides Leidse.;

a 'very simple, cheap and easily manufactured iire-cracker whichpossesses the advantages and unique features already above specified.

Having thus described my invention, I claim l. A pyrotechnical device,comprising a tubular casing having an internal annular shoulder at oneend, a transverse end closingr means stopped against said shoulder, acharge of explosive positioned against said end closing means withinsaid casing, a soft paper keeper member for retaining said cx plosivecharge in position, said casing pro viding an open ended tubulardischarge barrel beyond said keeper member, and a fuse having` its innerend inserted in said charge of explosive.

2. pyrotechnical device` comprising a tubular casing having an inturnedcrimped end, a partition member stopped against said crimped end to thusclose one end of said easing, a charge of explosive tamped against theinner side of said partition member, means for retaining said chargeagainst displacement, said tubular casing providing an open endeddischarge barrel beyond said charge, and an ignition fuse having itsinner end in contact With said charge.

In testimony, that I claim the invention set forth above I have hereuntoset my hand this 26th day of January, 1925.

MILTON M. ADLER.

